Not until Mr. Smith came to China what kind of a country she is from.A. Didn’t he know 　B

发布时间：2020-08-15 00:04:07

Not until Mr. Smith came to China     what kind of a country she is from.
A. Didn’t he know 　
B. Had he known
C. Hadn’t he known
D. Did he know

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A. Didn’t he know 　
B. Had he known
C. Hadn’t he known
(答案→)D. Did he know
解析：not until 在句首主句要部分倒装。
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